How do I print off a picture from facebook or my email?

For a valentines day gift, theres a picture that my friend has up on facebook that I really want to frame for my boyfriend. I have the photo paper you need to go in the printer, but i didn't know once I copied it or she sent it to me in an attachment what I do with it from there? I don't want to have to buy some expensive program. And obviously I'm really bad with computers :) Thanks guys!